Derivative Financial Instruments

12 Months Ended

Dec. 31, 2012

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Derivative Financial Instruments

We have limited exposure to derivative financial instruments. For our variable rate debt, we are sometimes required by our lenders to limit our exposure to interest rate fluctuations by entering into interest rate swap agreements, which moderate our exposure to interest rate risk by effectively converting the interest on variable rate debt to a fixed rate. The fair values of the interest rate swaps are reflected as assets or liabilities in the balance sheet, and periodic changes in fair value are included in interest expense or equity and partners’ capital, as appropriate.

As of December 31, 2012 and 2011, we had interest rate swaps with aggregate notional amounts of $51.0 million and $51.4 million, respectively, and recorded fair values of $8.0 million and $7.0 million, respectively, reflected in accrued liabilities and other in our consolidated balance sheets. At December 31, 2012, these interest rate swaps had a weighted average term of 8.1 years. We have designated these interest rate swaps as cash flow hedges and recognize any changes in their fair value as an adjustment of accumulated other comprehensive loss within equity to the extent of their effectiveness. Changes in the fair value of these instruments and the related amounts of such changes that were reflected as an adjustment of accumulated other comprehensive loss within equity and as an adjustment of earnings (ineffectiveness) are discussed in Note 9.

If the forward rates at December 31, 2012 remain constant, we estimate that during the next 12 months, we would reclassify into earnings approximately $1.7 million of the unrealized losses in accumulated other comprehensive loss. If market interest rates increase above the 3.43% weighted average fixed rate under these interest rate swaps we will benefit from net cash payments due to us from our counterparty to the interest rate swaps.

At December 31, 2012 and 2011, we had borrowings payable subject to total rate of return swaps with aggregate outstanding principal balances of $74.0 million and $75.0 million, respectively, that were collateralized by four properties. We use total rate of return swaps to convert fixed-rate property debt obligations to a variable rate to lower our cost of borrowing. In exchange for our receipt of a fixed rate equal to the underlying borrowing’s interest rate, the total rate of return swaps require that we pay a variable rate plus a risk spread. The underlying borrowings are callable at our option, with no prepayment penalty. We have designated the total rate of return swaps as hedges of the risk of overall changes in the fair value of the underlying borrowings. At each reporting period, we estimate the fair value of these borrowings and the total rate of return swaps and recognize any changes therein as an adjustment of interest expense. During the periods presented, we determined these hedges were fully effective and accordingly we made no adjustments to interest expense for ineffectiveness.

At December 31, 2012, the weighted average fixed receive rate under the total return swaps was 5.9% and the weighted average variable pay rate was 2.1%, based on the applicable index rate effective as of that date. The debt subject to these total rate of return swaps matures in 2036 whereas the corresponding swaps mature in May 2014.

The total rate of return swaps require specified loan-to-value ratios which may require us to pay down the debt or provide additional collateral. At December 31, 2012 and 2011, we had provided $20.0 million of cash collateral pursuant to the swap agreements, which is included in restricted cash in our consolidated balance sheets.